Track lines

Track definition lines can be used to configure the display further, e.g. by grouping features into separate tracks. Track lines should be placed at the beginning of the list of features they are to affect.

The track line consists of the word 'track' followed by space-separated key=value pairs - see the example below. Valid parameters used by Ensembl are:

name - unique name to identify this track when parsing the file

description - Label to be displayed under the track in Region in Detail

priority - integer defining the order in which to display tracks, if multiple tracks are defined.

useScore - a value from 1 to 4, which determines how scored data will be displayed. Additional parameters may be needed, as described below.

colour gradient - defaults to Yellow-Green-Blue, with 20 colour grades. Optionally you can specify the colours for the gradient (cgColour1, cgColour2, cgColour3) as either RGB, hex or X11 colour names, and the number of colour grades (cgGrades). (example file)